diff --git a/examples/ASP.NET Core 3/ASP.NET Core 3 - VS2019/Startup.cs b/examples/ASP.NET Core 3/ASP.NET Core 3 - VS2019/Startup.cs
index f829224e..448b36bb 100644
--- a/examples/ASP.NET Core 3/ASP.NET Core 3 - VS2019/Startup.cs	
+++ b/examples/ASP.NET Core 3/ASP.NET Core 3 - VS2019/Startup.cs	
@@ -4,6 +4,7 @@
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.HttpsPolicy;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
@@ -41,17 +42,23 @@ public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
             }
             app.UseHttpsRedirection();
             app.UseStaticFiles();
-
             app.UseRouting();
-
             app.UseAuthorization();
 
+            // needed for  ${aspnet-request-posted-body} with an API Controller. Must be before app.UseEndpoints
+            app.Use(async (context, next) => {
+                context.Request.EnableBuffering();
+                await next();
+            });
+
             app.UseEndpoints(endpoints =>
             {
                 endpoints.MapControllerRoute(
                     name: "default",
                     pattern: "{controller=Home}/{action=Index}/{id?}");
             });
+
+         
         }
     }
 }